Virgo overdensity

In our quest to understand the possibility of measuring the one-dimensional and three-dimensional kinematics of Local Group substructure with stellar spectra, Zolotov and I discussed the enigmatic Virgo overdensity today. The debate over its origin could be ended with a good velocity. I feel certain someone has already measured it, but it is a good exercise to measure it with the data we have in hand nonetheless.

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